WHY DOES CAR HESITATE AROUND 40MPH?

Hello, These codes show there is a random misfire detected (across multiple cylinders with no specified sequence), plus a cylinders 2 and 3 are misfiring. The are a number of issues you could be having, and it is very important that you test items, perform past due maintenance, and verify faults before replacing parts. Otherwise, it is probably a better idea to bring it to professional to avoid costly repairs that are not necessary.

Possible failing ignition coils - and or spark plugs .. Oil ponding in spark plug tubes. Seems you or someone you know has been working on this problem - maybe same person can check the items I posted. Otherwise - visit local auto repair facility.